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- Question
3, 8, 13, 24, 41,?
Options- A. 70
- B. 75
- C. 80
- D. 85
- Correct Answer
- 70
ExplanationThe pattern followed is : nth term + (n + l)th term + (n + 1) = (n + 2)th term.Thus, 1st term + 2nd term + 2 = 3rd term; 2nd term + 3rd term + 3 = 4th term and so on.
So, missing term = 6th term = 4th term + 5th term + 5 = 24 + 41 + 5 = 70.
Series Completion problems
Search Results
- 1. 45, 54, 47,?, 49, 56, 51, 57, 53
Options- A. 48
- B. 50
- C. 55
- D. None of these Discuss
Correct Answer: 55
Explanation:
The given sequence is a combination of two series:I. 45, 47, 49, 51, 53 and II. 54, ?, 56, 57
Clearly, II consists of consecutive natural numbers, starting from 54.
So, missing term = 55.
- 2. 5760, 960,?, 48, 16, 8
Options- A. 120
- B. 160
- C. 192
- D. 240 Discuss
Correct Answer: 192
Explanation:
The pattern is ÷ 6, ÷ 5, ÷ 4, ÷ 3, ÷ 2.So, missing term = 960 - 5 = 192.
- 3. 4, 7, 12, 19, 28,?
Options- A. 30
- B. 36
- C. 39
- D. 49 Discuss
Correct Answer: 39
Explanation:
The pattern is + 3, + 5, + 7, + 9, .....So, missing term = 28 + 11 = 39.
- 4. 325, 259, 204, 160, 127, 105,?
Options- A. 94
- B. 96
- C. 98
- D. 100 Discuss
Correct Answer: 94
Explanation:
The pattern is - 66, - 55, - 44, - 33, - 22, .....So, missing term = 105 - 11 = 94.
- 5. 1, 5, 13,25,41,?
Options- A. 51
- B. 57
- C. 61
- D. 63 Discuss
Correct Answer: 61
Explanation:
The pattern is + 4, + 8, + 12, + 16......So, missing term = 41 + 20 = 61.
- 6. 10, 14, 26, 42, 70,?
Options- A. 100
- B. 102
- C. 106
- D. 114 Discuss
Correct Answer: 114
Explanation:
Each term in the series, except the first two terms, is 2 more than the sum of the preceding two terms.So, missing term = (42 + 70) + 2 = 114.
- 7. 10, 18, 28, 40, 54, 70,?
Options- A. 85
- B. 86
- C. 87
- D. 88 Discuss
Correct Answer: 88
Explanation:
The pattern is + 8, + 10, + 12, + 14, .....So, missing term = 70 + 18 = 88.
- 8. 8, 28, 116, 584,?
Options- A. 1752
- B. 3502
- C. 3504
- D. 3508 Discuss
Correct Answer: 3508
Explanation:
The pattern is x 3 + 4, x 4 + 4, x 5 + 4,.....So, missing term = 584 x 6 + 4 = 3508.
- 9. 121, 143, 165, 186, 209
Options- A. 143
- B. 165
- C. 186
- D. 209 Discuss
Correct Answer: 186
Explanation:
Each term in the series is obtained by adding 22 to the preceding term.So, 186 is wrong and must be replaced by (165 + 22) i.e. 187.
- 10. 6, 15, 35, 77, 165, 221
Options- A. 35
- B. 77
- C. 165
- D. 15 Discuss
Correct Answer: 165
Explanation:
The terms of the series are products of two consecutive prime numbers i.e. (2 x 3),(3 x 5), (5 x 7), (7 x 11),.....
So, 165 is wrong and must be replaced by (11 x 13) i.e. 143.
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